Linux Distros Unpatched Vulnerability : CVE-2023-22496

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(226908);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/26");

  script_cve_id("CVE-2023-22496");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2023-22496");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - Netdata is an open source option for real-time infrastructure monitoring and troubleshooting. An attacker
    with the ability to establish a streaming connection can execute arbitrary commands on the targeted
    Netdata agent. When an alert is triggered, the function `health_alarm_execute` is called. This function
    performs different checks and then enqueues a command by calling `spawn_enq_cmd`. This command is
    populated with several arguments that are not sanitized. One of them is the `registry_hostname` of the
    node for which the alert is raised. By providing a specially crafted `registry_hostname` as part of the
    health data that is streamed to a Netdata (parent) agent, an attacker can execute arbitrary commands at
    the remote host as a side-effect of the raised alert. Note that the commands are executed as the user
    running the Netdata Agent. This user is usually named `netdata`. The ability to run arbitrary commands may
    allow an attacker to escalate privileges by escalating other vulnerabilities in the system, as that user.
    The problem has been fixed in: Netdata agent v1.37 (stable) and Netdata agent v1.36.0-409 (nightly). As a
    workaround, streaming is not enabled by default. If you have previously enabled this, it can be disabled.
    Limiting access to the port on the recipient Agent to trusted child connections may mitigate the impact of
    this vulnerability. (CVE-2023-22496)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-22496");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-22496");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:netdata");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/Debian Linux-11");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "netdata"},
          {"reference": "netdata-apache2"},
          {"reference": "netdata-core"},
          {"reference": "netdata-core-no-sse"},
          {"reference": "netdata-plugins-bash"},
          {"reference": "netdata-plugins-nodejs"},
          {"reference": "netdata-plugins-python"},
          {"reference": "netdata-web"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}